I had to create an account after searching and searching online for the best export settings in Premiere Pro.
Most of the answers I found were from years ago!
So I did some testing on my own. I exported the same clip multiple times in multiple formats with variations of the settings of each one and I came to a conclusion as to what I find to be the best settings. My comparisons were only made after uploading the videos to YouTube also, as I find that YouTube can sometimes alter different file types differently when processing them.
I wrote my finding in my blog along with the settings and screen shots here:
https://goo.gl/8GZq4i
Brian White Videographer, Editor
Wrap Arizona L.L.C.
The Video Production Blog
https://goo.gl/8GZq4i